Question

What type of wave is a sound wave??

Answer 1

It is a longitudinal pressure wave. That means sound waves oscillate back and forth along the direction of travel. This is different from a wave on a string that travels down the string but oscillates up and down as it moves. (a so-called transverse wave)

Answer 2

This link tells you everything you need to know about sound wave:

https://quizlet.com/52121797/sound-waves-flash-cards/

Answer 3

Sound waves occur when something causes layers of, say, air molecules to vibrate or oscillate back and forth over very small distances. The, say, air molecules transfer energy along the layers from the source of the sound to the receiver (very often your ear, and the eardrum inside your ear). Sound can also cause molecules of water to oscillate and transfer energy in a similar (but much faster) way. Sound can also cause atoms of iron and other solids to oscillate but, faster again.
So, it's a longitudinal (in the same direction as the direction it is travelling in) oscillation (as opposed to light which oscillates at right angles to the direction of travel) of some material medium (as opposed to light which can travel in a vacuum).